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The mysterious Piedras Bola: Where did these giant stone balls come from?

The Piedras Bola Silver Mine, located in the Sierra de Ameca, is named after a giant stone ball lying just outside its entrance. In 1967, the former superintendent of the mine, Ernest Gordon was shown five more huge stone balls in the hills above the mine, prompting him to place a telephone call to archaeologist Matthew Stirling in Washington DC.

The joys of senderismo

Senderos de México is an organization which catalogs, maintains and signposts trails (senderos) in Mexico. More than that, it promotes a concept called senderismo, a word I find almost impossible to translate into English.